Remember, the assignment is to describe how you are like your mother, not to discuss if you will become your mother. Two entirely different things.
I am like my mother is some ways. From her I got my love and talent for music. From her I got a good deal of my stubbornness. She and I look a lot alike people say. She instilled in me a strong sense of right and wrong. I have my mother's compassion. I have her weak nails

. I acquired a strong sense of family from her. I can get really anxious like my mother.
Does all that mean I am my mother? Heavens no! Much of what I got from her is positive (she is a truly good individual), but not all of it. I know a good portion of my worry and anxiety I learned from her.
Consider this more of a list of common traits rather than an indictment on your character.